comp.lang.idl-pvwave archive: archive

Home » Public Forums » archive » asynchronous timers

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: asynchronous timers [message #89318 is a reply to message #89314]

Sat, 16 August 2014 01:28

markb77
Messages: 217
Registered: July 2006

Senior Member

On Saturday, August 16, 2014 12:51:23 AM UTC+2, Doug wrote:
> All,
>
>
>
> For IDL 8.4, we have done a couple of things to timers:
>
>
>
> * They no longer fire in the middle of system callbacks. For example,
>
> they won't interrupt widget event handlers and object cleanup methods.
>
> This is better since there are fewer nasty surprises.
>
>
>
> * For when there still are nasty surprises, there will be the "block"
>
> and "unblock" methods to enable the programmer to specify when they
>
> don't want code to be interrupted. This is useful if currently
>
> executing code is writing/reading to data that a timer will read/write.
>
> Place "block" and "unblock" around code that shouldn't be interrupted.
>
>
>
> As for pseudo-multithreading, one really doesn't get any benefit since
>
> there's still only one IDL interpreter. For that you'll need another
>
> IDL, of course.
>
>
>
> Cheers,
>
> Doug

Thanks for the info. When you say "they won't interrupt widget event handlers", what do you mean exactly? Suppose I have a GUI application, which is event driven. Essentially ALL routines are handling events in some sense. Does this mean the asynchronous timer wouldn't fire at all in my application? Or do you mean only that the timer wouldn't interrupt the "top level" event handler? (ie the procedure that is specified when starting Xmanager?)

best,
Mark

Report message to a moderator

[Message index]

		asynchronous timers By: markb77 on Thu, 14 August 2014 03:40
		Re: asynchronous timers By: dg86 on Thu, 14 August 2014 08:16
		Re: asynchronous timers By: Jim Pendleton on Thu, 14 August 2014 20:30
		Re: asynchronous timers By: Doug on Fri, 15 August 2014 15:51
		Re: asynchronous timers By: markb77 on Sat, 16 August 2014 01:28
		Re: asynchronous timers By: Doug on Mon, 18 August 2014 09:27
		Re: asynchronous timers By: Doug on Tue, 19 August 2014 11:12
		Re: asynchronous timers By: markb77 on Wed, 20 August 2014 08:59

Previous Topic:	Customising ENVI water depths tool with IDL
Next Topic:	Reading CEOS format using IDL

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Fri Oct 10 12:42:49 PDT 2025

Total time taken to generate the page: 0.24258 seconds